Evidence of our nation's birth abounds in Boston, a hub of revolution that is essentially the oldest city in the United States. Visitors are compelled to walk the 2.5-mile Freedom Trail around the city center, and bear witness to 16 historical locations related to the history of America.

A favorite for many cruise-goers and tourists, Ketchikan, Alaska, is a charming city located near the state’s southeastern edge.

León, central Mexico, in Guanajuato State, in a fertile river valley, at an altitude of about 6000 ft. León is the industrial, commercial, and transportation center for a rich agricultural region and is a shoe-manufacturing center. Founded in 1576, León was a Spanish colonial administrative center.

Kaziranga National Park stretches across the floodplains of the Brahmaputra River in Assam, shaped as much by water as by wildlife. Established in the early 20th century, it became central to conservation efforts in India, most notably for the greater one-horned rhinoceros. The park’s history reflects a long negotiation between protection, seasonal flooding, and the human communities that live around its edges.

Quetzaltenango, often called Xela by locals, is Guatemala’s second-largest city and a hub of indigenous culture, colonial history, and highland landscapes. Surrounded by volcanoes, including the towering Santa María, the city sits at over 7,600 feet above sea level, giving it a crisp mountain climate that contrasts with the country’s tropical lowlands.